Rotational Molding Vs. Injection Molding

Plastic molding businesses are leading the market in plastic manufacturing because of the benefits of using the rotational and injection molding processes. There are many benefits to using these processes. In rotational molding, the mold spins at an even speed as the poly-based resin is injected inside. This enables the poly-resin to cover the sides of the frame evenly.  The mold proceeds to spin as the temperature drops from hot to cool that allows the substance to harden consistently. Both injection and rotational molding processes have advantages and disadvantages of their own. The following list has some of their differences.


Injection molding offers many options in material and complete structure and shape of the finished goods. Pieces are made from a variety of resins, plastics, and other substances. Injection molding can also manufacture elaborate details and sophisticated designs. The materials suitable for rotational molding are more limited than those of injection molding. Only poly-based adhesives, nylon, and plastisols can be used to create a part. Also, because of the complexity of using complex designs into rotation-molded pieces, only simple shapes can be produced. More sophisticated forms slow down the rotation molding manufacturing process.


Both rotational molding and injection molding have wholly automated production lines. The difference is the time each manufactured part spends on the production line. In rotational molding each piece spends much longer on the production line, resulting in fewer parts per minute than injection molded articles.

Cost Effectiveness

Injection molding is usually done at a lower cost per piece than rotational molding. This is because it produces pieces more swiftly than rotational molding and thereby decreases the cost. Additionally, the polymer-based resins and other scarce materials needed for rotational molding are more expensive than the vast variety of plastics available for injection molding. These rotational-molding materials also need costly additives when mixing the poly-resins, and nylon before production. However, rotationally made plastics are more durable and lightweight than those produced by injection molding.

Even though rotational molding may be new in the market and expensive, the products made using this method are more durable and versatile. It is also more eco-friendly than injection molding and can produce a more extensive variety of products. They have to be constructed to endure the harshest of conditions. If you would like to know more about rotational molding, you can follow this link – You can also contact the company and inquire about how rotational molding would benefit your company.